Cutting-tool for planers, lathes, &amp;c.



G. R. MIDDLETON. CUTTING TOOL FOR PLANERS, LATHES, 6w. APPLICATION rum) no. 22, 1908.

Patented Oct. 12, 1909.

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CUTTING-TOOL FOB FLANBBS, LATHES, &c.

My invention re ates to cutting-tools for use on Planers, lathes etc. and consists of a tool having interchangeable cutting points. One object of my invention is to provide a tool of the above mentioned class which will be stron and durable, thereby rendering it particular y adaptable to heavy cutting.

Another object is that the several parts will be easy of adjustment and that the entire structure may be manufactured at a' nominal cost.

These ob'ects I attain in the following manner, re erence bein had to the accom-' panying drawings in w ich V Figure 1, is a front view of my invention fixed to the carriage of a planer; Fig. 2, is a section on the line aa, Fig. 1; Fig. 3, is an enlar ed transverse sectional view on the line -b Fig. 2; Fig. 4, is' a side elevation showing the tool raised and the planer apron clamp acting asthe'means for. retaining the cutting point; Fig. 5, is ars tive view of a cutting point; Fig. 6, s a ongitudinal section of the same; Fig.7, 'is a perspective view of a yoked clampin member which I employ; Fig. 8, is a m ified form of the clamping means; Fig. 9, is a perspective view of a clamping shoe for use inthe modification, Fig.8; and Figs. 10 and. 11 are views of. cutting points having different styles of cutting faces. a

Cuttin tools such as. are used on large planers, athes etc. .for heavy cutting, have to be made of. special uality steel and as theonly really success ones have been those constructedfrom a single bar of steel; which is very expensive, it will be readily seen that with so many different styles of cutting faces necessary, the-cost ofthe same would be enormous. r

There have been cutting tools made-heretofore, in which only then cutting faces or vention, while the tool is this atter genera-l class its construction is such that it may be for making heavy cuts and is gen- Speciflcation of Letters Patent. Application filed December 28, 1908. scrial'lio. 468,846. 7

points are made of the special. cutting steel -Patented Oct. 12, 1909.

erally available for the work upon which the previously used tools 'were unsatisfactory.

Referrigg-to the drawings, 1 represents'the bar or b y portion of the too]. which is clam d to the carriage 2 of a planer by the usu apro'n clamps 3 and 4.

The lower end of the bar '1 is provided with a V-shaped groove 5, the bottom 5 of which runs at an angle to' the front face of the bar 1 and stops abruptly at 6 forming a shoulder.

This V-shaped groove 5 is for the reception of a cutting point such as 7 which may have any style cutting face 7.

The side 8 of the cuttin point 7 is wedgesha d so as to fit in the l-shaped groove 5 in t e bar 1, and has its end 9 abuttingthe shoulder 6: The side 10 opposite theside 8 is dished at 11 for the reception of the curved tongue 13 of "the clamping member '14. This clamping member 14 has extensions 15, for the purpose of straddling the bar 1; said extensions being slotted at 16 to fit over apin17inthebar1.

A bolt 18, paming from rear to front through the bar .1, isthreaded at its outer end andenters' a tapped hole 19 in the clampin member 14.

assembling the parts of the device, the desired cutting point is placed within the groove 5; the curved tongue 13 is pressed within the dished portion 11 of the point.

7 so that the bolt 18 may enter the tap ieed hole 19 thereby rigidly h'olding the oint tween the clampingmember 14an the bar 1. The cutting pointis prevented from turning or twisting by the wedge shaped face 8 snugly fitting the v sha ove 5'in the bar 1 and also by the cli ef f ace 13 of the .clamp 14 fitting the recess 11 of .the said point 7. I v .The bar 1 extending nearly the whole len h of the cutting point forms a positive bac 'ng; whilethe shoulder 6 acts to prevlent movement due to theupward-thrust of. t e

tion.

'The bottom of the dished portionllruns at an angle with the bottom 5 of thegroov e ,5' and it will be readily seen that when held between the bar 1 and the clamping member 14 the art of the cutting --point point in the groove '5 during its'operag between them willform'an inverted wedge. With; Y

the fulcrum of the clamping member 14 at a: and an entire surface contact between the bar 1 and the side 8-of the cutting point? i and between the clamping member 14 and the dished portion '11 of the cutting point, great pressure can be exerted upon the latter by said clamping member, thereby said cutting face at the proper distance from the end of the bar 1.

B having the clam ing member 14 suspen ed from the pin 1 as it is when not in use, it is always 1n the correct position for clam ing when a cutting point is inserted en cutting a plane surface or one wh ch will allow the planer carriage to travel close to the work I may dispense with the bolt 18, by raising the bar .1 and using one of the apron clamps to act urioln the clampingcmember 14as is shown in While in the several views of the drawings I have shown my device attached to a planer,-

it cai1 be used with advantage upon other machines such as lathes, slotters and milling machines.

In the modification (Fig. 8) I have shown a shoe 20 movably mounted between the clampmg member 14 and the cutting omt.-

' S aid shoe is free to adjust itself to sai cuttmg point so as to insure its accommodation.

to any irregularity which may exist in said parts.

- I claim:- I a 1. The combination of a cutter bar having a groove of substantially V-shaped section terminating abruptly in a shoulder, a cutting int fitting said groove and abutting a on said shoulder, said cutting point having a recess, with means acting within the recess for holding said point to the cutter bar.

. 2.' The combination of a cuttin tool holder having a groove of substanti y V-shaped section formed .with its bottom running at an incline with the line of cut andterminatmg in a shoulder, a cutting tool fitting said gage and abutting on the shoulder, there recess in thexouter surface of the cuttin tool, said recess increasing in depth towar the cutting end of the tool and having its bottom running at an angle to the bdttom of the groove, with a clamp acting within the recess for securing the tool to the holder.

3 3. The combination of a cutter bar, hav

. sing a groove of substantially V-shaped sec tion, a cutting point fitting said groovr and v f 'decreasingtin width toward its cutting-sand there being-a longitudinally extending recess in the outer surface of the cutting point,

said' recess increasingin depth toward the cutting and ofthe cutting point, .a clamp acting within the with means acting 11%11? retaining the cuttmg point in place. i

a central and longitudinally extending saidshoulder, said cuttin point pro-.

vided with a longitudina y extending recess having its bottom runnin at an angle to the bottom of the groove, a ever fulcrumed on the cutter bar and bearing upon tlfd bottom of the recess, with means act' upon said lever to ri 'dly secure the cutting point to v the cutter ar.

5. The combination ofva cutterbar having a oove and provided with projections, a cutting point fittingv said groove, a clam hung from said projections for holdin sai cutting points in position, and a bolt ho ding the clamp to the cutter bar. J

6. The combination of a cutter bar having a;substantially V-shaped groove, terminating in a shoulder, a cutting point fitting said grooveand abutting on said shoulder, said cutting point increasing in width rearwardly from its cutting end, a clamp engaging said point with means acting upon said glamp to hold the cutting point to the cutter ting point, a clamp for holding the oint to the cutter bar, means for rigidly hol the clamp to said cutter bar, andmeans for su porting the clamp independently of the said holding means when the cutting point is removed.

running at an incline to the line of cut of the tool and terminating in a shoulder, a cutting point fitting said groove and abuttin on sa1d shoulder there being formed in sai cutting point a recess curved in cross section and havmg its bottom at an angle to the bottom of the groove, with means acting, upon the bottom of the recess for equalizing the pressure of the cutting point upon each side of the groove to rigidly secure said point to the cutter bar.

9. The combination of a cutter bar, a cut: ting point, and a clamping device forretaining the cutting point to the cutter bar, with projections on the sides of the cutter bar, and lugs onthe clamping device en ag-. ing said projections for supporting sai device when the tool is removed.

10. The combination in a cuttin tool of a cutter bar having a groove of su stantially V-shaped section terminating in a shoulder, a cutting point fitting said groove and abutting'on said shoulder, there bei a recess in said cuttingpoint formed with its bottom.

running at an angle to the bottom of the groove, a lever fulcrumed on the cuiterbar 7. The combination of a cutter bar, a cutcaches and hearing within the recess, the portion of the cutting point between the lever and the bottom of the groove being in the form of an inverted wedge, with means acting upon said lever to secure the cutting point to the cutter bar. 1

11. The combination of a cutter bar having a groove of substantially V-shaped section terminating in a shoulder, a cutting point fitting said groove and abutting said shoulder, said point having a recess running at an angle to the bottom of said groove, and A means acting upon said point within the re- 0888 150 hold -i't to saidbar. 12. The combination of a cutter bar havmg a groove of V-shaped section terminating in a shoulder, a cutting point fitting said groove and abutting on the shoulder, said cutting point being of substantially the same length as the groove and having a recess in its outer surface running at an angle to the bottom of said groove, with means acting within the recess to clamp said cutting point to said bar.

In testimony whereof, I have-signed my name to thisspecification, in the presence of two subscribing witnesses.

CHARLES R. MIDDLETON. Witnesses:

AUoUs'rUs B. C01 1'Es, WM. A. BARR. 

